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p400
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  1. 6.5L Diesel Engine
    A buddy of mine has given me the task of installing his brand new p400 in his 99 Tahoe. (I did head gaskets with optimizer heads, ARP's, 4" exhaust, injectors etc in the summer of 2020) I have 6 or 7 trucks all with 6.5s, and am quite familiar with them. Never paid any attention to p400s...
  2. 6.5/6.2 High Performance Engine Modifications
    Ok folks, I’ve had this P400 sitting in my garage for just under a year now so I guess it’s time to get going on the install. I picked this up from the GEP facility last December when I just happened to be in Ohio on business with my dually so I made some calls and was able to pick it up...
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